That looked pretty violent. Bike looks fubared. He was def going too fast for his skills.
If I was the Vette guy I would be pissed. Looks like the rider just gave up on the turn. Had he stuck with it he might have snuck by the Vette guy.
The camera folks don't cause accidents.

Is he going to ride after this incident, or tell the missus, 'that's it, enough motorcycling for me'? I hope so for his sake, that was fairly dismal bit of riding, worn out saying 'accident looking for a place to happend' fits the bill here. He is ok i hope, he totaled the bike though